<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        body {
            display: flex;
            margin: 0;
            padding: 0;
            justify-content: center;
            align-items: center;
            width: 100vw;
            height: 100vh;
        }
        
        h1 {
            font-size: 24rem;
            text-shadow: 0px 0px 20px #333;
        }
    </style>
</head>

<body>
    <h1>404</h1>
</body>

</html>